<template>
  <div class="cityList" ref="wrapper">
    <div>
      <div class="area">
        <div class="title bordertb">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title bordertb">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item of hotCities" :key="item.city">
            <div class="button" @click="handleCityClick(item.name)">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div
        class="area"
        v-for="(item,idx)
         of cities"
        :key="idx"
        :ref="idx"
      >
        <div class="title bordertb">{{idx}}</div>
        <div class="item-list" v-for="itemInfo of item" :key="itemInfo.id">
          <div class="item border-bottom" @click="handleCityClick(itemInfo.name)">{{itemInfo.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  import BScroll from 'better-scroll'
  import {mapState,mapMutations} from 'vuex'

  export default {
    name:'CityList',
    props:{
      cities:Object,
      hotCities:Array,
      letter: String
    },
    computed:{
      ...mapState({
        currentCity:'city'
      })
    },
    mounted(){
      this.scroll = new BScroll(this.$refs.wrapper)
    },
    methods:{
      handleCityClick(city){
        //this.$store.dispatch('changeCity',city)
        this.changeCity(city)
        this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
    },
    watch:{
      letter(){
        if(this.letter){
          const element = this.$refs[this.letter][0]
          this.scroll.scrollToElement(element)
        }
      }
    }
  }
</script>

<style lang="stylus" scoped>
.bordertb{
  border-top:1px solid #ccc;
  border-bottom: 1px solid #ccc;
}
.border-bottom{
  border-bottom:1px solid #ccc;
}
.cityList{
  position:absolute;
  top:1.58rem;
  left:0;
  right:0;
  bottom:0;
  overflow:hidden;
  .title{
    line-height:.54rem;
    background:#eee;
    padding-left:.2rem;
    color:#666;
    font-size:.26rem;
  }
  .button-list{
    padding:.1rem .6rem .1rem .1rem;
    overflow:hidden;
    .button-wrapper{
      float:left;
      width:33.33%;
      .button{
        margin:.1rem;
        padding:.1rem 0;
        text-align:center;
        border:.02rem solid #ccc;
        border-radius:.06rem;
      }
    }
  }
  .item-list{
    .item{
      line-height:.76rem;
      padding-left:.2rem;
    }
  }
}
</style>
